MenuetOS sits in an interesting nexus between astonishing technical achievement and computerised work of art. The super-speedy, pre-emptive multitasking operating system is still, despite adding more driver support, more included applications, an improved GUI and digital TV support over the years, capable of fitting on a floppy disk (assuming you can find one).

MenuetOS is a technical marvel. Not only is it written entirely in assembly, it also shoves a fully capable multitasking operating system on a single floppy disk.